Electrical insulator.



PATENTED JULY 7, 1908.

- H. F. SELINGER.

ELECTRICAL INSULATOR.

APPLICATION FILED DEO.12.1907. Y

INVENTOR WIT/VESSZ'S: 22

H. F. Selingr. I

UNITED srAtrEs PATENT OFFICE.

HUGO SELINGER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO WAGNER ELECTRIC MANUFAC- TURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

ELECTRICAL IN SULATOR.

city of St. Louis, inthe State of 'ssouri,

have invented a certain new and useful Electrical Insulator, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin s, forming part of this specification. 1

y invention relates to an electrical insulator and more particularly to an insulator in the general form of a bushing suitable for insulating the lea 'ng in and leading out Wires of a transformer, or other electrical dc! rice contained in a metallic casing. It is essential that the conductors of such device be prevented from coming in contact with the metallic casing or housing. I have found that the ordinary strai ht form of bushin usually heretofore use is not effective for this purpose especially when the transformer or other device is portable, as the wires or conductors are liable to be displaced a considerable distance when the device is moved. The wires or conductors may thus be allowed to come in contact with the casing thereby grounding the circuit or device on the box or even short-circuiting the circuit or device.

One object of my invention is to construct an insulator which will effectively overcome the above defects in the form of insulator bushings heretofore .used. To this end I employ a bushing provided with a head having a channel substantially at right angles to t the opening in the body of the insulator,

said channel being formed by a li which separates the conductor from the wa l of the casing and by flanges which prevent the lat-v eral movement of the conductor.

Another object of my invention is to so construct the insulator as to prevent the collection and retention of Water around the conductor at the point where it leaves the insulator.

Still another object of my invention is to provide improved means for cementing theconductor in place in the insulator.

In the accompanying drawings which illustrate some forms of insulator made in accordance with my invention, Figure 1 is an isometric projection showing an insulator Specification of Letters Patent. Application filed December 12, 1907. Serial No. 406,217.

such as is iatented July 7, mos.

adapted to receive four conductors; Fig. 2 is a similar view showing an insulator adapted to receive two conductors; Fig. 3 is a similar view showing an insulator adapted to receive one conductor; Fig. 4 is a view similar to F g. 2but showing a slight modification and Fig. 5 1s a vertical section through one of the insulators and a portion of a transformer casing to which-the same is applied.

Like marks of reference refer to similar parts in the several views of the drawings. g

The insulator which ma be made of pdf celain or any other suita le material, consists of a body portion 10 and a head 11. The body portion 10 may be of any suitable form. It is preferably cylindrical when the device is intended for a single conductor, as shown in Fig. 3, and preferably rectangular whenever a greater number of conductors,\a s shown in Figs. 1, 2-and 4. Formed in the body 10 are one or morepassages 12 for the conductors. These .pass'a es 12 communi cate with channels forme in the heads 11. These channels are substantially at right angles to the passages 12 and are formed bymeans of lips 13 and flanges 14.

i In the preferred form of my device, as

shown in Figs. 1, 2 and 3, the flanges 14 are sufficient in number to form a separate channel for each passage in the body 10. The flanges, however, may beless in number, as shownin Fig. 4, thus forming a single channel for two or more of the assages. In

div portions 10 said body portions 10 with depressions 15.

Referring to Fig. 5,.16 represents the easing of a transformer, said casing being provided wit'h'a lateral offset portion 17 having an opening 18 in its bottom. Through this opening 18 the body 10 of the insulator is adzzpted to project and the insulator may be hel in position by means of a suitable cemen'ting material 19 interposed between the casing and insulator, the .grooves 15 in the body 10 enabling the cement to secure a firmer hold upon the insulator. 20 is the conductor which asses through the passage 12 in the body 0 the insulator'and is then bent atright angles soas to pass along the channel formed by the lip 13 and flan es 14. In order to prevent water from .cgl ecting around the conductor 20 at the point where it leaves the insulator, I provide the lower all lateral movement of the conductor.

end of the passage 12 with en enlsi tion 21, thus forming a dripping edge 22 out cementing-material may run down between the conductor and the insulator to or early to the enlarged port-ion 21 oi? the p; age. 25 represents the wall oi the casing and the lip 13 above referred to, is so arran ed. to project over this wall and thus eldectively prevent the conductor from coming in contact therewith. While the l'lengcs id prevent 26 represents the cover of the transformer casing.

Having fully described my i-nveuticm, what I claim as new and desire to secure by Let-- ters Patent of the United States, is:

1. An electrical insulator, comprising a body portion adapted to be secured in a casing and having a passage for a conductor, a head having a projecting lip, and .i'langes forming with said lip an open top channel substantially at right angles to and communicating with said passage.

2. An electrical insulator, eomprising a body portion adapted to be secured in a e sing and having a plurality of passages for conductors, a head having a projecting lip and flanges forming with said lip open top channels substantially at right angles to and communicating with. said passages.

An electrical insulator, cmnprisin" a body portion adapted to be secured in a Ens ing and having a passage for a conductor, said passage being enlarged at its lower end to form a dripping edge out oi emit-act with the conductor, and a head. provided with a laterally opening channel comnuniieating with said passage.

4. An electrical insulator, comprising a body portion adapted to be secured in. it cos ing and having'a passage for a conductor, said passage being enlarged at its upper end to form a cement Well, and a head provided with a laterally opening channel connnunieating with said passage.

5. An electrical insulator, comprising a body portion adapted to be secured in a cesing and having a passage for a .coiuluetor, said passage being enlarged at its lower end to form, a dripping edge out of contact with the conductor and also having an enlargement at its upper end servin as cement ell, and a head provided with a laterally opening channel communicating with said passage.

6. An electrical insulator, comprising a angles to and coininiunicating with said passage.

7. An electrical insulator, comprising a iody portion adapted to project througl'i. the opening of a casing and provided with external indenl'atious, said body portion also having it plurality of passages for conductm's, an enlar d head having a projecting lip and llanges lorniing with said lip channels substantially r ght angles to and connnunicatii'ig with i passages.

8. The con'ibinetion with s casing for an electrical device, of a lateral oil'set to said casing provided with an opening in its bottom, an insulator body passing through said opening and provided with a passage for z conductor, and a head on said insulator body provided with a lip extending over the wall ol" the casing.

9. The combination with a casing for an electrical device, of it lateral oll'sct to snid casing provided with an opening in the bottom, an insulator body passing through said opening and provided with a passage lor a conductor, a head on said insulator body provided With a lip extending over the wall of said casing, and flanges forming with said lip a channel colnnnmicating with saidpassage.

ll). The c mibioatioin With a casing for an electricaldevice, of a lateral ollset to said casing provided with an opening in the bottom, an insulator body passing through said opening and provided with a passage for a con ductor, said passage being enlarged at its inner end to form a dripping edge out of contact with the conductor, a head on said in- SlllLtilOl body provided with a lip extending over the Wall of said casing, and flanges forming with said lip a channel conin'iunicating with said 11. The combination with a casing for an. electrical device, of a lateral oi'l'set to said casing provided with an opening in the bottom, an insulator body passing through said opening and provided. with a passage for a (ZOULl'UCtUI', said passage being enlarged at its upper end. to form a cement Well, a head on said insulator body provided. with a lip extending over the Wall of said casing, and llanges forming with said lip a channel coniinunicating with said passage.

12. The combination with a casing for an electrical device, of a lateral oll'sct to said casin provided with an opening in the bottom, an insulator body passing through said opening and provided with a passage for a. conductor, said passage being enlarged at its lower end to form a. dripping edge out of contact with the conductor, and Hlb'fi. enlarged at its upper end to form a cement well, a head.

on said insulator provided with a lip extending over the wall of said casing, and flanges 5 forming with said lip a channel comnnfnicating with said passage.

In testimony whereof I have hereunto set my hand and allixed my seal in the presence of the two subscribing witnesses.

HUGO Fl SELINGER.

'Witnesses:

L. GUTMANN,

WM. J. FIXNEGA 

